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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'caca469f30eb09e898085cead54c9fe0fbf47001ccb2ecfbab7f000ca5021319' 
  AND token = 'Hu/K7rE5djcAs87z8l2zipj4RtplvaajOA1SrOT4IMY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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