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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2105159126198d10f1b019ca146167185107074d88077e09005ab216ba344eb7' 
  AND token = 'kNa/2Og9XyPV/avnsGAaLhZXy4c4KvH7Ufuux2g98p8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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