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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '95095d44b0b20bcd58ce0d02dd50ff5f060aba1d49a8205dd402bd1b641513f1' 
  AND token = 'x58CcBBQvLC0K6+z20wKp+AjDTcdA8+M7CwfGE1qIOw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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