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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf90de2bb672700b631c46018f15e146ba9f33a51b0c44f98a439d7e22220e31' 
  AND token = 'VP+tR183SkF2f8B2ss4xJJW++Gb0WkBWGuM5z80TxgU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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