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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '83931737f326e7efe23faa51a449ad48be720f49b7ef07168ebac8811af8a94e' 
  AND token = 'Ut+qW27IxCTh/t70l0S/2UhyIQrwvjHgd+fTWd4orOg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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