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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '84dd276a360a6db87eb04b2082fc4f422d80a3b93597a9de324a2f66b1391661' 
  AND token = 'LUyfNVQyAvgHR5S6q24/etLs2WuNfypRBDW60Igg6Lc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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