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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01933501c4bfac5ab75d7e235612d43ce469d77165d8b29f4c8c26497fa33834' 
  AND token = 'TS2UH/8e4m0srg+9mxfTTk7ad/XV6zvP06rFhFDViEE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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