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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2cc53e530c2be6e0c089f642e407219c68aab7d407d6b7c3e26ba732fdf87efc' 
  AND token = '+IlsdTrPTEoge8rB2oOch0LHMenrtFL0i0EpLy0BEAs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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