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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e17c24f5d68bda5dee7dce01eca6ed5341160cd2ca24eddf3076136fa077d35b' 
  AND token = 'B2goDxsEIDwJC8DquKc3XiEj+rsC4Evs1SBWNZihYU0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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