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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '72d0956a4e54374aa99be5d6cd2196ca016ab0012248dfe68cdce6346910b10a' 
  AND token = '9z1O5g9sLsXxvHpmXLxsDx7oSs2C8wQES54WGVxUNAM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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