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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f30ed7a0f23da55c42b2f1611eab7f3d2a3710eabb4aeae353f4a3825b229a9a' 
  AND token = 'tuqMaTDP/hldpg8xtscg5uFHI9smX8FnDG98SdjjEYE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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