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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eb13afdd2777daaaa49d23c5d6da2a338b6ed3e855abc3667bf414e1c45396f5' 
  AND token = 'LevkY0meSQVxi5d1TP81p2xeYFHxVBwwo+0RllxsOi0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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