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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '09f5450b0deb1b01398b0bdfbe48457cdcaa92f00ec79f398831c0379d78829c' 
  AND token = 'TNf7cNp77qNmnk6HZCNEcoEfr//qRbf+b/2disrbZlA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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