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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '05f28da76293adff955458a5afc38b89bb07246994f34c9beccbdbc95fe0de43' 
  AND token = 'bpgH7SpS7PA7tiCBe6KT5xIzyvdueSP23Ir2HP4/Qr4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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