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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '48f4e9ea3d98bdef0e5e3a23a0e7a7352f3bbdba924e4133fc63067f81637540' 
  AND token = '913XBU/dw5oT0RNpa3uJ/S7RMojNmWkrUUAoYJis6rg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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