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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'adb114603f2a7e677c67f2d8469d42b5d11dd940bdbd20d9a8e6e17f0485c73b' 
  AND token = 'LHXBBrnR7QaYzG8M3TbR6mnfR342rTeJG72Xx7umC7k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}