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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1648dc4c529946ecea05906d1ac73b389a64ad6107a177f90b959bc27643362a' 
  AND token = 'NNnILcAvx8B4aHnIc/ACmdGb5X/RiouX3OF2CKFJ33M=' 
  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"
    }
  }
}