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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ce96893dac927e92d612b6a248d9de45901a401583a7122d12ee4819f3484618' 
  AND token = 'Ub4oz93bZvN5o/uAl5jT0ibNvX91FafrKd5jjXTco/o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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