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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0d6a9511e0e75bc63ef91ae7287e73d95dd70c13f7bf6e502d30e89e710a949b' 
  AND token = 'KmOhk8pe2q0Q/TL7KFwaK0sIkeN1qkjbeSBHDF/phyI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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