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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ed1e0f00b2c4ce704cc3fc3d63517f507c45e6506c8c600145dd8343fac242d7' 
  AND token = 'RizBlpGk4GN0Zm/OdFIk0a1mBWnyjNv2X67tj5cOzUc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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