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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c41c0dec0fa888c8c4476626c27de2524611cc10e0cccffb2a79ab0b0fed1c9f' 
  AND token = 'Tg6QluF/V45KZOQLOAgaEhAspldq+pjRIEx3CXBkgdo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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