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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '36e9540c4b803d6258268f588bd39ba3a0b4165544ff84a0260be4abb10aa0b9' 
  AND token = '5Q0v9016tH3C+A/5T1H+FH0x87Dz4m4Co3jJN0HMgEw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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