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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '14116fb5172ee5f71e33d2179e8a88b0cfec9c7c32ca39042e2d1453556b86d1' 
  AND token = 'SGsqA274fLqU88HRYYfNTnFnAb3/0JeB1dftQpS+MJs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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