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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '454df3dda53c8eae82b62c5ee0e4015bebfed0fa07419999cc860af68a06a68a' 
  AND token = '8gtM5aKsRBo4BwfWUegde7G3bYYhe4nt5BbnDtvIM5Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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