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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9696810467c07c11ab85d95ff2fbb5e199d8e9f5dbef4ff7367f3ec9ae1fe2a3' 
  AND token = 'abpkz9sc2+YjepJDG/7vZk9hJOs53wACKtna7EyJx4c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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