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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '067f1962bd5fcc04427f6c42cdd40b78beac65b4c8913f20bb8e07b985230cd7' 
  AND token = 'TIT5q2iFrzqnfOcvKRdX3j7DIq4arKELcRh4n8ciAp4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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