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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7102eadb96e827117bc02feeafeb8864e2b4d3830ecc52d8ca6ca92cce49dd7d' 
  AND token = '1wACZvfazo9Kmus0fDdpgbVKKyzMYQePU+4w1zji48U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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