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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'edc505c1f4ea12d262c744dc826aeb11be8af4a1e75163f731422a8158fa845a' 
  AND token = '5n0KNZCRpJ7T/PU/l9V5M0W5lvxCMhqIn2jZypIL8HM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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