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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ab2ede3918b2a3e3b151bcd05c985d79165d502d41d5d4234022bdc7bdb5bf9c' 
  AND token = 'nW2N3rZGWgSA41Wq1kKBbYBiLIaVYA3whv1Xp6hNA78=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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