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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3077a06138054f093400ce6d5ff3a2a7c12e4a95a0dc13e249c1cc4f212bf175' 
  AND token = 'FoggIhx8oHEvqwswFWdb4LUoCG0mfboaVmfdgVRFRjM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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