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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '23be41b1506d96e13f435c7250f7e779828982bee172d1445c0dcdf751b8e087' 
  AND token = 'DsevEww9U9SULclfX7o12s6ir+lziSSzAStcR6DkAdE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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