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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '119f26aff24ee4e39310cbf367f3e85a8813e9beca80ac0caad68647af2da38e' 
  AND token = 'xb/qaxsHYHALM4+QXdH94NUDx+bbieOc+NFJT+knZt8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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