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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd5c97b001b2a0ea4989fc18e05b1a08e6ce3609791a377144026f48399591135' 
  AND token = 'naQ6RGo0oiu5Ofg3mkfU00ESHt9o8DwYrdq2PQqTfGc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}