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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '497b9ae14ed4ce63d186b1e5d3222edf0c2875971b3ebaa0ff7da48eb6e56ae4' 
  AND token = 'jt1NIN/MxyVg+fNKoOFl3VJVeyvRY7fauEs1yuQXYeQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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