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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '43f5744295dc1b8fbae5138290599d2ff073040f3e5fdf81d02e4b7c8dd94464' 
  AND token = 'IPAUNQ09M7D5NK0JkT2hC63WugC45rGUb0MmcgQhEz0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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