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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ef37f2342683e4c27419dab253fc0dd079bbac019471a17400d6bffbd2a0d260' 
  AND token = 'pT7N5hl9OjPo+yF/l80LZeq1uIRvM0Ky0dccwJmXjf4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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