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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '60af644f129b03b8a75b84f257e453694a7905db4802fac9fbe6b193b6cba0a4' 
  AND token = 'zC4q1eZTEoJovhVRD0Pu7SfHw0l5kmNR8Q9X9IErsog=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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