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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7df806bc507f31f3572c87d2c0115f1a5a80900b278b0c55818a9b6687aecf4e' 
  AND token = 'qmW8U1BRMBckk7g4rUFKYYT13uXS++2Y+kXV2hlxnbc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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