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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7adee69ddc7d52b33e8d92c1d51543195c6f895f9cb5992c6e6aa68e9b3d9672' 
  AND token = 'RtYS4Vp5915sw9DbFk5OcDw226ojf/Ee+igal20FVL0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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