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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '05891477d2dd61cd3de0cc1a8f7ebe2dd1127cede53ebf393bf413f7ec60c5db' 
  AND token = 'IgnLPNOnjllldto0GdUkwDty3DctWTivvqjYUUjNXg0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00068

JSON explain

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