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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '10f7b3e170ce7117e95f2c5ecb745956bbc1aa02dcd4a5bf8a92967d62487de7' 
  AND token = 'pexHhTwUadFLYo/lGH1HCFiXvQ8ddR85ZbNewcUfSTQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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