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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a45e8e6695673880a7de818726ae9d110a4d3ac72baf092dac792763b7331b0c' 
  AND token = 'W5tuQp53vo5nOquimasim0F/EY1DhvzAEaWRlBMOa+M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00084

JSON explain

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