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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5070061d94c8c7f5ba79c3cea64d4729d3e30451aaaa117c9046acca0a8b8f4b' 
  AND token = 'CytJqeQdbkLU9cilw/dVgd8WwZKnTXMhAjP65OToCXU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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