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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '84f8dc59fa625dd9bc55091aa6361cbb79c034de11ccaad52d24ba82bf819537' 
  AND token = 'hFhvJ0chDiL4RkyTT6VbtC8wBy8M8tklNlymmMoGx+M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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