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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e759950b7659bf75dfa34826e1ee92e6966651e725d3d53695c14d2027f53a8d' 
  AND token = 'c32uu2ltgyxkkTS0iIBgWZtUG1K8yq9n6Wa8ww2KoG8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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