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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '65d6be0fa3e085701b0478e2870589c012177f45900d066bd23e6164d7afc9b6' 
  AND token = '6855Km18EJothN0F1BbcFVf6XBO5/EWyvRhw+r4MSzY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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