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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f9c1c74275b66b0ae3565a429dd4b100ea1246b9bacdd46f374ce3d57ed84851' 
  AND token = 'p3nhl8+Z2MNxXcOJkEg/0BR08Uaa+rkDIvHbt455/fM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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