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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1006aa14d1f55d23ad6b9728cb286fbdd4e0322722cf24c8a8c9a1fcca736cf7' 
  AND token = 'ol24iKRQ3DscglucL/Cf48a2jafYM5CIaIQxf1I+nzE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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