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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0160268521fc2d2aed7bb696277efd6de8921135f640f2e2a6143622f85b83a0' 
  AND token = 'uvC1jfKj0gOanv1Oqnwl9xWZhwxeKiaLzwN6h+Ua0a0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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